@book { PublicPrivatePartnershipsforDevelopment,
    title = "Public Private Partnerships for Development",
    author = "Tatjana {Kühne}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832473402",
    url = "https://m.diplom.de/document/222631"
}